Flat colour is $20 per character, and shading is $30 per character (this is a shaded example.) Backgrounds/props are negotiable. Turnaround time is roughly six to eight weeks from payment.
The most important thing to remember is that these do not come with approval stages - I'll accept your commission request and complete it from start to finish, then show it to you. No changes to the final product will be made unless I missed something from your ref or description. All digital works except for icons are by default made at 300 DPI, 8.5x11. Larger works can be negotiated.